Move all proxy sends to the same thread

src/generator.c

@@ -115,11 +115,6 @@ struct proxy_instance {
 	notify_instance_t *notify_instances;
 
 	pthread_t pth_precv;
-	pthread_t pth_psend;
-	mutex_t psend_lock;
-	pthread_cond_t psend_cond;
-
-	stratum_msg_t *psends;
 
 	mutex_t share_lock;
 	share_msg_t *shares;
@@ -150,7 +145,12 @@ struct generator_data {
 	int proxy_notify_id;	// Globally increasing notify id
 	ckmsgq_t *srvchk;	// Server check message queue
 	pthread_t pth_uprecv;	// User proxy receive thread
-	pthread_t pth_upsend;	// User proxy send thread
+	pthread_t pth_psend;	// Combined proxy send thread
+
+	mutex_t psend_lock;	// Lock associated with conditional below
+	pthread_cond_t psend_cond;
+
+	stratum_msg_t *psends;
 };
 
 typedef struct generator_data gdata_t;
@@ -1429,10 +1429,10 @@ static void submit_share(gdata_t *gdata, json_t *val)
 	json_object_set_nocheck(val, "id", json_integer(share->id));
 
 	/* Add the new message to the psend list */
-	mutex_lock(&proxy->psend_lock);
-	DL_APPEND(proxy->psends, msg);
-	pthread_cond_signal(&proxy->psend_cond);
-	mutex_unlock(&proxy->psend_lock);
+	mutex_lock(&gdata->psend_lock);
+	DL_APPEND(gdata->psends, msg);
+	pthread_cond_signal(&gdata->psend_cond);
+	mutex_unlock(&gdata->psend_lock);
 
 out:
 	if (!success)
@@ -1494,9 +1494,7 @@ out:
 /* For processing and sending shares. proxy refers to parent proxy here */
 static void *proxy_send(void *arg)
 {
-	proxy_instance_t *proxy = (proxy_instance_t *)arg;
-	connsock_t *cs = &proxy->cs;
-	ckpool_t *ckp = cs->ckp;
+	ckpool_t *ckp = (ckpool_t *)arg;
 	gdata_t *gdata = ckp->data;
 	stratum_msg_t *msg = NULL;
 
@@ -1505,22 +1503,17 @@ static void *proxy_send(void *arg)
 	pthread_detach(pthread_self());
 
 	while (42) {
-		proxy_instance_t *subproxy;
+		proxy_instance_t *proxy, *subproxy;
 		int proxyid = 0, subid = 0;
 		int64_t client_id = 0, id;
 		notify_instance_t *ni;
 		json_t *jobid = NULL;
 		bool ret = true;
+		connsock_t *cs;
 		json_t *val;
 		tv_t now;
 		ts_t abs;
 
-		if (unlikely(proxy->reconnect)) {
-			LOGINFO("Shutting down proxy_send thread for proxy %d to reconnect",
-				proxy->id);
-			break;
-		}
-
 		tv_time(&now);
 		tv_to_ts(&abs, &now);
 		abs.tv_sec++;
@@ -1530,13 +1523,13 @@ static void *proxy_send(void *arg)
 			free(msg);
 		}
 
-		mutex_lock(&proxy->psend_lock);
-		if (!proxy->psends)
-			cond_timedwait(&proxy->psend_cond, &proxy->psend_lock, &abs);
-		msg = proxy->psends;
+		mutex_lock(&gdata->psend_lock);
+		if (!gdata->psends)
+			cond_timedwait(&gdata->psend_cond, &gdata->psend_lock, &abs);
+		msg = gdata->psends;
 		if (likely(msg))
-			DL_DELETE(proxy->psends, msg);
-		mutex_unlock(&proxy->psend_lock);
+			DL_DELETE(gdata->psends, msg);
+		mutex_unlock(&gdata->psend_lock);
 
 		if (!msg)
 			continue;
@@ -1557,9 +1550,11 @@ static void *proxy_send(void *arg)
 			LOGWARNING("Failed to find client_id in proxy_send msg");
 			continue;
 		}
-		if (unlikely(proxyid != proxy->id)) {
-			LOGWARNING("Proxysend for proxy %d got message for proxy %d!",
-				   proxy->id, proxyid);
+		proxy = proxy_by_id(gdata, proxyid);
+		if (unlikely(!proxy)) {
+			LOGWARNING("Proxysend for got message for non-existent proxy %d",
+				   proxyid);
+			continue;
 		}
 
 		mutex_lock(&proxy->notify_lock);
@@ -1569,9 +1564,13 @@ static void *proxy_send(void *arg)
 		mutex_unlock(&proxy->notify_lock);
 
 		subproxy = subproxy_by_id(proxy, subid);
-		if (subproxy)
+		if (unlikely(!subproxy)) {
+			LOGWARNING("Proxysend for got message for non-existent subproxy %d:%d",
+				   proxyid, subid);
+			continue;
+		}
 		cs = &subproxy->cs;
-		if (jobid && subproxy) {
+		if (jobid) {
 			JSON_CPACK(val, "{s[soooo]soss}", "params", proxy->auth, jobid,
 					json_object_dup(msg->json_msg, "nonce2"),
 					json_object_dup(msg->json_msg, "ntime"),
@@ -1580,16 +1579,12 @@ static void *proxy_send(void *arg)
 					"method", "mining.submit");
 			ret = send_json_msg(cs, val);
 			json_decref(val);
-		} else if (!jobid) {
-			stratifier_reconnect_client(ckp, client_id);
-			LOGNOTICE("Proxy %d:%s failed to find matching jobid for %sknown subproxy in proxysend",
-				  proxy->id, proxy->url, subproxy ? "" : "un");
 		} else {
 			stratifier_reconnect_client(ckp, client_id);
-			LOGNOTICE("Failed to find subproxy %d:%d to send message to",
-				  proxy->id, subid);
+			LOGNOTICE("Proxy %d:%s failed to find matching jobid in proxysend",
+				  proxy->id, proxy->url);
 		}
-		if (!ret && subproxy) {
+		if (!ret) {
 			LOGNOTICE("Proxy %d:%d %s failed to send msg in proxy_send, dropping to reconnect",
 				  proxy->id, subid, proxy->url);
 			disable_subproxy(gdata, proxy, subproxy);
@@ -2054,9 +2049,6 @@ static void prepare_proxy(proxy_instance_t *proxi)
 	proxi->parent = proxi;
 	mutex_init(&proxi->proxy_lock);
 	add_subproxy(proxi, proxi);
-	mutex_init(&proxi->psend_lock);
-	cond_init(&proxi->psend_cond);
-	create_pthread(&proxi->pth_psend, proxy_send, proxi);
 	create_pthread(&proxi->pth_precv, proxy_recv, proxi);
 }
 
@@ -2217,7 +2209,6 @@ static void delete_proxy(gdata_t *gdata, proxy_instance_t *proxy)
 	mutex_lock(&gdata->lock);
 	HASH_DEL(gdata->proxies, proxy);
 	/* Disable all its threads */
-	pthread_cancel(proxy->pth_psend);
 	pthread_cancel(proxy->pth_precv);
 	Close(proxy->cs.fd);
 	mutex_unlock(&gdata->lock);
@@ -2461,6 +2452,9 @@ static int proxy_mode(ckpool_t *ckp, proc_instance_t *pi)
 		} else {
 			prepare_proxy(proxy);
 			create_pthread(&gdata->pth_uprecv, userproxy_recv, ckp);
+			mutex_init(&gdata->psend_lock);
+			cond_init(&gdata->psend_cond);
+			create_pthread(&gdata->pth_psend, proxy_send, ckp);
 		}
 	}